Final answer:
The minimum cardinalities between a merged event and the agents involved in the individual transaction cycles being merged change from 0 to M, reflecting a requirement for multiple agents to participate after merging.
Step-by-step explanation:
When a merged event involves different agents in each of the individual transaction cycles being merged, the minimum cardinalities between that event and those agents changes from 0 to M.
This change indicates that previously, participation of an agent in the event might not have been necessary (indicated by 0), but after merging, multiple agents (indicated by M) are required to participate in the event.
In the context of databases and entity-relationship modeling, the cardinality expresses the minimum and maximum number of entity occurrences associated with one occurrence of the related entity.
Whenever a merged event involves different agents in each of the individual transaction cycles being merged, the minimum cardinalities between that event and those agents changes from 0 to M.
This means that in the merged event, there can be 0 or more agents associated with it. The change in minimum cardinalities reflects the fact that the merged event includes a broader range of agents than the individual transaction cycles.